Option Explicit
Event DownloadProgress(CurBytes As Long, MaxBytes As Long, SaveFile As String)
Event DownloadError(SaveFile As String)
Event DownloadComplete(MaxBytes As Long, SaveFile As String)
Public downStat As Boolean
Private Sub UserControl_AsyncReadComplete(AsyncProp As AsyncProperty)
On Error Resume Next
Dim f() As Byte, fn As Long
If AsyncProp.BytesMax <> 0 Then
fn = FreeFile
f = AsyncProp.Value
Open AsyncProp.PropertyName For Binary Access Write As #fn
Put #fn, , f
Close #fn
Else
RaiseEvent DownloadError(AsyncProp.PropertyName)
End If
RaiseEvent DownloadComplete(CLng(AsyncProp.BytesMax), AsyncProp.PropertyName)
downStat = False
End Sub
Private Sub UserControl_AsyncReadProgress(AsyncProp As AsyncProperty)
On Error Resume Next
If AsyncProp.BytesMax <> 0 Then
RaiseEvent DownloadProgress(CLng(AsyncProp.BytesRead), CLng(AsyncProp.BytesMax), AsyncProp.PropertyName)
downStat = True: Timer1.Enabled = True
End If
End Sub
Private Sub UserControl_Resize()
SizeIt
End Sub
Public Sub BeginDownload(url As String, SaveFile As String)
On Error GoTo ErrorBeginDownload
downStat = True
UserControl.AsyncRead url, vbAsyncTypeByteArray, SaveFile, vbAsyncReadForceUpdate
Timer1.Enabled = True
Exit Sub
ErrorBeginDownload:
downStat = False
MsgBox Err & "开始下载数据失败!" _
& vbCrLf & vbCrLf & "错误:" & Err.Description, vbCritical, "错误"
End Sub
Public Sub SizeIt()
On Error GoTo ErrorSizeIt
With UserControl
.Width = ScaleX(32, vbPixels, vbTwips)
.Height = ScaleY(32, vbPixels, vbTwips)
End With
Exit Sub
ErrorSizeIt:
End Sub这是一个下载的Activex OCX,不用任何控件就可从HTTP上下载文件,(一定要写在VB 的Activex OCX中!), 支持进度条。 但出错后就不能中止异步,或异步执行不知如何中止,望高手指点!!!!!!!!!!!!!!!!!
Event DownloadProgress(CurBytes As Long, MaxBytes As Long, SaveFile As String)
Event DownloadError(SaveFile As String)
Event DownloadComplete(MaxBytes As Long, SaveFile As String)
Public downStat As Boolean
Private Sub UserControl_AsyncReadComplete(AsyncProp As AsyncProperty)
On Error Resume Next
Dim f() As Byte, fn As Long
If AsyncProp.BytesMax <> 0 Then
fn = FreeFile
f = AsyncProp.Value
Open AsyncProp.PropertyName For Binary Access Write As #fn
Put #fn, , f
Close #fn
Else
RaiseEvent DownloadError(AsyncProp.PropertyName)
End If
RaiseEvent DownloadComplete(CLng(AsyncProp.BytesMax), AsyncProp.PropertyName)
downStat = False
End Sub
Private Sub UserControl_AsyncReadProgress(AsyncProp As AsyncProperty)
On Error Resume Next
If AsyncProp.BytesMax <> 0 Then
RaiseEvent DownloadProgress(CLng(AsyncProp.BytesRead), CLng(AsyncProp.BytesMax), AsyncProp.PropertyName)
downStat = True: Timer1.Enabled = True
End If
End Sub
Private Sub UserControl_Resize()
SizeIt
End Sub
Public Sub BeginDownload(url As String, SaveFile As String)
On Error GoTo ErrorBeginDownload
downStat = True
UserControl.AsyncRead url, vbAsyncTypeByteArray, SaveFile, vbAsyncReadForceUpdate
Timer1.Enabled = True
Exit Sub
ErrorBeginDownload:
downStat = False
MsgBox Err & "开始下载数据失败!" _
& vbCrLf & vbCrLf & "错误:" & Err.Description, vbCritical, "错误"
End Sub
Public Sub SizeIt()
On Error GoTo ErrorSizeIt
With UserControl
.Width = ScaleX(32, vbPixels, vbTwips)
.Height = ScaleY(32, vbPixels, vbTwips)
End With
Exit Sub
ErrorSizeIt:
End Sub这是一个下载的Activex OCX,不用任何控件就可从HTTP上下载文件,(一定要写在VB 的Activex OCX中!), 支持进度条。 但出错后就不能中止异步,或异步执行不知如何中止,望高手指点!!!!!!!!!!!!!!!!!
If Not downStat Then
Timer1.Enabled = False
Exit Sub
End If
Static Cs As Integer
If Cs > 2 Then Cs = 0
UserControl.Picture = P1(Cs).Picture
Cs = Cs + 1
DoEvents
End Sub
加入:此代码无用,只是在下载时显示图片,好像其它下载软件一样,下地时有动画效果·
If Not downStat Then
Timer1.Enabled = False
Exit Sub
End If
Static Cs As Integer
If Cs > 2 Then Cs = 0
UserControl.Picture = P1(Cs).Picture
Cs = Cs + 1
DoEvents
End Sub
加入:此代码无用,只是在下载时显示图片,好像其它下载软件一样,下地时有动画效果·